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Article: Blood and tissue compatibility of modified polyester: Thrombosis, inflammation, and healing

TitleBlood and tissue compatibility of modified polyester: Thrombosis, inflammation, and healing
Authors
KeywordsFluoropassivated
Vascular graft
Thrombosis
Inflammation
Healing
Issue Date1997
Citation
Journal of Biomedical Materials Research, 1997, v. 39, n. 1, p. 130-140 How to Cite?
AbstractPoly(ethylene terephthalate) (PET) has been reported in literature to be moderately inflammatory and thrombogenic. To moderate the inflammatory response, PET fabric was surface modified by either Fluoropassiv(TM) fluoropolymer (FC), or an RGD-containing peptide (RGD). Samples were subsequently autoclave sterilized and implanted subcutaneously in Sprague Dawley rats for 2 to 4 weeks. Retrieved samples were evaluated histopathologically for indications of material toxicity and healing. Minimal acute or chronic inflammation was associated with the fabrics after 2 and 4 week implant duration. However, fibroblast proliferation into FC modified fabric (PET/FC) was less than that into unmodified (PET) and RGD modified fabric (PET/RGD) after 4 weeks, suggesting that FC modification of PET may inhibit excessive tissue growth. Additional samples of modified and unmodified fabrics were placed in stainless steel mesh cages, which were then implanted subcutaneously for 4 weeks. Cellular exudate was extracted weekly and cell concentrations within the exudate measured. Total leukocyte count (TLC) (reflective of local inflammation) at 1 week for PET/RGD was greater than that for PET/PC and PET. TLCs after 4 week implant decreased for all sample groups. In a separate experiment, PET vascular grafts surface modified by either FC or RGD were contacted 1h with blood using the baboon arteriovenous (AV) shunt model of thrombosis in both the presence and absence of heparin. Accumulation of 111In labeled platelets (reflective of thrombus accumulation) upon grafts was less in the presence of heparin (effect significant at p = 1.2 x 10-6, two-way ANOVA). Accumulation (in the presence of heparin) upon PET/RGD was less (p = 0.19), and upon PET/FC significantly less (p = 0.016) than that upon the unmodified PET control, suggesting that FC modification of PET may inhibit thrombus accumulation. | Polyethylene terephthalate (PET) implanted in rats for 2 to 4 weeks were evaluated histopathologically for indications of material toxicity and healing. PET fabric was surface modified by either FluoropassivTM fluoropolymer (FC), or an RGD-containing peptide to moderate the inflammation. In a separate experiment, PET vascular grafts surface modified by either FC or RGD were contacted 1 h with blood using the baboon arteriovenous shunt model of thrombosis in both the presence and absence of heparin.
Persistent Identifierhttp://hdl.handle.net/10722/216150
ISSN
2004 Impact Factor: 3.652
2006 SCImago Journal Rankings: 0.474

 

DC FieldValueLanguage
dc.contributor.authorChinn, Joseph A.-
dc.contributor.authorSauter, Joseph A.-
dc.contributor.authorPhillips, Richard E.-
dc.contributor.authorKao, Weiyuan J.-
dc.contributor.authorAnderson, James M.-
dc.contributor.authorHanson, Stephen R.-
dc.contributor.authorAshton, Timothy R.-
dc.date.accessioned2015-08-25T10:21:57Z-
dc.date.available2015-08-25T10:21:57Z-
dc.date.issued1997-
dc.identifier.citationJournal of Biomedical Materials Research, 1997, v. 39, n. 1, p. 130-140-
dc.identifier.issn0021-9304-
dc.identifier.urihttp://hdl.handle.net/10722/216150-
dc.description.abstractPoly(ethylene terephthalate) (PET) has been reported in literature to be moderately inflammatory and thrombogenic. To moderate the inflammatory response, PET fabric was surface modified by either Fluoropassiv(TM) fluoropolymer (FC), or an RGD-containing peptide (RGD). Samples were subsequently autoclave sterilized and implanted subcutaneously in Sprague Dawley rats for 2 to 4 weeks. Retrieved samples were evaluated histopathologically for indications of material toxicity and healing. Minimal acute or chronic inflammation was associated with the fabrics after 2 and 4 week implant duration. However, fibroblast proliferation into FC modified fabric (PET/FC) was less than that into unmodified (PET) and RGD modified fabric (PET/RGD) after 4 weeks, suggesting that FC modification of PET may inhibit excessive tissue growth. Additional samples of modified and unmodified fabrics were placed in stainless steel mesh cages, which were then implanted subcutaneously for 4 weeks. Cellular exudate was extracted weekly and cell concentrations within the exudate measured. Total leukocyte count (TLC) (reflective of local inflammation) at 1 week for PET/RGD was greater than that for PET/PC and PET. TLCs after 4 week implant decreased for all sample groups. In a separate experiment, PET vascular grafts surface modified by either FC or RGD were contacted 1h with blood using the baboon arteriovenous (AV) shunt model of thrombosis in both the presence and absence of heparin. Accumulation of 111In labeled platelets (reflective of thrombus accumulation) upon grafts was less in the presence of heparin (effect significant at p = 1.2 x 10-6, two-way ANOVA). Accumulation (in the presence of heparin) upon PET/RGD was less (p = 0.19), and upon PET/FC significantly less (p = 0.016) than that upon the unmodified PET control, suggesting that FC modification of PET may inhibit thrombus accumulation. | Polyethylene terephthalate (PET) implanted in rats for 2 to 4 weeks were evaluated histopathologically for indications of material toxicity and healing. PET fabric was surface modified by either FluoropassivTM fluoropolymer (FC), or an RGD-containing peptide to moderate the inflammation. In a separate experiment, PET vascular grafts surface modified by either FC or RGD were contacted 1 h with blood using the baboon arteriovenous shunt model of thrombosis in both the presence and absence of heparin.-
dc.languageeng-
dc.relation.ispartofJournal of Biomedical Materials Research-
dc.subjectFluoropassivated-
dc.subjectVascular graft-
dc.subjectThrombosis-
dc.subjectInflammation-
dc.subjectHealing-
dc.titleBlood and tissue compatibility of modified polyester: Thrombosis, inflammation, and healing-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1002/(SICI)1097-4636(19980101)39:1<130::AID-JBM15>3.0.CO;2-J-
dc.identifier.pmid9429104-
dc.identifier.scopuseid_2-s2.0-0030631559-
dc.identifier.volume39-
dc.identifier.issue1-
dc.identifier.spage130-
dc.identifier.epage140-

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